https://bugs.kde.org/show_bug.cgi?id=420493
--- Comment #5 from owl-from-hogva...@protonmail.com --- POSSIBLE IMPLEMENTATION P_BUFFER - buffer of pressed keys S_BUFFER - buffer of suspended keys 1. Accumulate pressed keys in P_BUFFER 1.1 on keypress event add pressed key to P_BUFFER (works same for all buttons, so we would be able to start shortcut from any shortcut's keys) 2. on keyrelease event of any key contained in P_BUFFER, fire shortcut with all keys currently in P_BUFFER, including one that was released just before (that is because we won't delete it from P_BUFFER just after the key was released, but will wait for shortcut to fire and only then remove) Note: other (still pressed) keys are moved to suspending buffer S_BUFFER. That means that when other keys will be released they won't cause any undesired shortcuts. BUT when any new key is pressed, already pressed keys (i.e. contained in S_BUFFER) will be moved back to P_BUFFER. Key will be REMOVED (and not moved) from suspending buffer ONLY when released EXAMPLE Lets imagine that we have next shortcuts defined: ctrl + shift - switch keyboard layout ctrl + shift + t - open new terminal instance ctrl + shift + d - show desktop And user acts like this: "wants to show desktop and open terminal" 1. press "shift" 2. press "ctrl" 3. press "d" and release it (ctrl + shift are still pressed) 4. press "t" and release ctrl, shift, t in order 5. press ctrl, shift to switch keyboard layout 6. releases shift What happens according to the algorithm: 1. shift is added to P_BUFFER 2. ctrl is added to P_BUFFER 3. d is added to P_BUFFER 4. release event for "d" received 5. shortcut "show desktop" is fired 6. content of P_BUFFER is moved to S_BUFFER (i.e. ctrl, shift, d) 7. system detects that "d" is no longer pressed and removes it from S_BUFFER (so the content of S_BUFFER becomes "ctrl, shift") 8. press event for "t" received 9. ctrl, shift are moved back to P_BUFFER 10. "t" is added to P_BUFFER 11. "ctrl" release event received 12. open new terminal instance shortcut fired 13. content of P_BUFFER is moved to S_BUFFER (i.e. ctrl, shift, t) 14. system detects that "ctrl" is no longer pressed and removes it from S_BUFFER (so the content of S_BUFFER becomes "shift, t") 15. receives release events for "shift, t" 16. removes "shift, t" from S_BUFFER so it becomes empty 17. receives press events for "ctrl" and "shift" 18. adds them to the P_BUFFER 19. receives release event for "shift" 20. fire "switch keyboard layout" shortcut -- You are receiving this mail because: You are watching all bug changes.
